Hub jack



J. P. DORAU July 7,l 1925.

HUB JACK Filed Feb. 11, 1924 @1w WA.

L d f d Nblhl/ Patented July 7, 1925.

UNITED STATES` JOHN P. DORAU, F HORICON, WISCONSIN.

HUB JACK.

Application filed February 11, 1924. Serial No. 692,188.

Y citizen of the United States, residing at Hoi-icon, in the county of Dodge and State et' lVisconsin, have invented certain new and useful Improvements in I-Iub Jacks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 1

My invention relates to improvements in jacks and the present disclosure is directed primarily to a jack intended to engage the hub of an automobile to take strain from the tire of such `a wheel, so that by using 'four of the jacks, all weight may be relieved from the tires.

One object of the invention is to provide an exceptionally simple and inexpensive jack provided with a novel construction and association of parts Jfor limiting the downward swinging of the loadlifting lever.

Another object of the invention is to provide a novel construction, whereby the jack may be vertically adjusted to any desired extent and effectively held in adjusted position.

lVith the foregoing in view, the invention resides in the novel subject matter herein! a't'ter described and claimed, the description being supplemented by the accompanying drawing.

Figures 1 and 2 are elevations looking in opposite directions at one form of jaclrconstructed in accordance with my invention.

Figure 3 is a vertical vsectional view as indicated by lines 3-3 of Fig. 2.

Figures 4 and 5 are elevations looking in opposite directions at a different form of the jack. l

Figure G is a vertical sectional view as indicated by line 6-6 of Fig. 5.

In the form oi construction shown in Figs. 1, 2 and 3, the numeral 1 designates a lower standard section preferably formed of wood and having its lower end widened to provide a pair ot shoulders 2 extending outwardly 'from the lower ends of its opposite vertical edges, widening of said standard also serving to give it more extended bearing upon the ground or a floor. The outer side ot the standard section 1, is beveled as indicated at 3, so that said standard secfrilon tapers upwardly as indicated most clealrly in -F 3.

At 4, I have illustrated an upper standard section which is also, by preference, formed ofwood, the inner -side ot' said section 4 being beveled so that it tapers downwardly as indicated at 5, the beveled inner face of the section 4 being in contact with the beveled outer face of the section l. I have shown adjusting bolts 6 passing through bolt-holes 7 in the section 4 and through vertical slots 8 in the section 1 and it will be seen that by loosening the nuts 9 of these bolts, the two sectionsV 1 and`4 may be relatively adjusted vertically, whereupon the nuts are tightened, and any downward force on the upper section 4, when the load-lifter, yet. to be described, is actuated, will serve to tight ly wedge the two sections together, due to their taper-s, thereby effectively holding -them in adjusted-position.

` The load-lifter above referred to, has been shown in the form of a U-shaped lever whose arms 10 straddle the jack standard and are V,pivoted to the upper end of the section 4, as indicated at 11, the lower ends of these arms being adapted to strike the -shoulders or stops 2 when the lever is swung downwardly to operative position, thereby limiting such movement. The upper ends of thel arms 10 are preferably curved outwardly to some extent as indicated in Fig. 3 and they carry a suitable hub rest, such as the padded roller 12, and attention is directed to the fact that when thearms 10 are swung downwardly to the maximum, theaxis 13 oit the roller 12 is outwardly spaced from the fulcrum or pivot 11 of said arms, so that there is no tendency for the Vlever to return to a raised, inoperative position. The arm-conM necting portion of the U-shaped lever, design nated by the numeral 14, may be suitably shaped to permit it to be readily gripped by hand when releasing the jack. In the present showing, the innery edge of the portion 14 has been cut away as indicated at 15 for this purpose.

In uthe form oi lconstruction shown in Figs. 4, 5 and 6, the numeral 1- designates.

a lower standard section having a widened lower end providing shoulders 2 having the same functions as the shoulders 2. The inner side of the standard section 1a has been shown beveled at its upper end as indicated at 3a, so that the standard section tapers upwardly, and vertical slots 8.a have been shown through the tapered portion. In this form of the invention, the upper standard section is in the v:form of a flat vertical plate 4P contacting with the outer side of the standard section la and provided with parallel vertical flanges 16 embracing the upper end of said section l, in such manner that the two sections may be relatively adjusted vertically, but cannot laterally cant. Vertical series of bolt-holes 7 have been shown in ythe plate 4 and bolts 6? may be passed through any of said openings and through the :slots 8, to connect the two standard sections in any desired relative .adj ustments, and due to the taper of the lower section l, it will be :seen that any tendency of the upper section'in to slide downwardly thereon, will nmerely result in extremely tight wedging of the two sections, in-to engagement with each other.

A load-lifter is shown in Figs. 4;, 5 and 6, of the samegeneral form as that shown in Figs 1,32 and 3, the arms 101 of said loadlifter, bein-g fille-ruined .at lia, prefer-ably by a pin or .a bolt passing through @the upper ends `of the 'flanges 1.6. The upper ends .of the -ar-ms lfOaare :shown as provi-ded with a hub rest in the form off-a padded saddle 12, As in Figs. 1, 2 and 3, the lower. ends off the. arms; 10 `are adapted to strike the shoulders .2a to limit :the downward swinging of the lload-litter for lever, and if desired, the uper ends of these shoulders may Ibe cutaway to some extent, as indicated at i7, so as to permit further downward vand inward swinging of `the lever, than would otherwise be possible.

Both forms of construction shown, .are simple and inexpensive, yet will be `reliable and easily operable, andrmay be read-ily ad,- .justed to any desired verticai height, for Vuse in connection with wheels (of dierent diameter-s. After adjustment, downward thrust fof :the upper .standard section, vupon actuation of the lead-flifterserves' to tightly lwedge the two Astandard sectionsv together., .so that slippage Ais prevented.y

As excellent results may -be obtained .from the details disclosed, they lmay wel-l be followed, but within the scope vof the invention as claimed, numerous changes maybe made.

i claim.:

l. A jack lcomprising -a standard widened .at its lower end to provide yprojections-extending oppositely from said standard, .a U- .shaped lever whose .ar-ms straddle the standard above #said projections and are .pivoted tothe upper end of said standard, the lower ends of said arms being adapted to strike said projections to limit the downward yswinging 'of the lever, and a load support extending between the upper ends of said arms, the upper portions 0i' the aforesaid projections beingcut away at one side of the standard to permit the lever arms to swing further inward than would otherwise be possible, the upper ends of said lever arms being outwardly curved 'to dispose said load support outwardly from the pivotal axis of the lever farms, causing the latter tov remain in contact with said projections, the lower arm connecting portion of said lever being cut Yaway tospace vthe remainder of such portion outwardly/.from :the `standard and permit the operator .to grip .it by hand.

2. In a jack, a lower standard section havingan upwardly tapered portion, .a vertical plate contacting with .said standard section and yhaving parallel vertical flanges rembracing the latter, adjustable connecting means between :said plate and vstandard section, including a'bolt passing through the plate and through the tapered portion of said standard section, at least :one of the two last named parts having .-a .slot receiving said bolt, and .a load-liftermounted on said plate, the .taper of. said standard section serving to tightly wedge it .against said plate when downward force is exerted on said plate by actuation of the 4load-lifter.

3. In ajack, a lower standard section han ing an upwardly tapered. portion, a vertical plate contacting with said standard section` and having parallel vertical flanges embracing the latter, adjustable connecting means between said plate and standard section, including a bolt passing through the plate and through the tapered portion of said stand- .ard section, .ajt vleast one of the two last knamed .parts having a slot-receiving said bolt, aU-sh'aped load-lifting lever whose .arms-are disposed .at the outer sides of said flanges, means pivoting said arms .to the upperl ends of said flanges, and .a load sup port `extending hetxveen the upper ends 0i.z the lever arms, the lower end of' said lever beingzadapted .to strike the standard to limit its downward swinging.

In testimony whereof I have hereuntol ai- ,ixed my signature. f

JOHN P. f DORAU.

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